What does a messiah do?

The Messiah, (Jesus Christ) is about Human Beings being reconciled back to God. Jesus came to earth as a man to die for mankind's sin so that man would have a way back to God. Man sinned in the Garden of Eden and every person since that time has been born spiritually dead. Spiritually dead people hate God and if they are not ("Born Again" John 3:1-8) they will go to hell (Lake of Fire, Revelation 20: 11-15). This is the very reason Jesus came down from heaven to earth approximately 2000 years ago. This is what the Messiah, Jesus is all about.

But just because Jesus went to the cross of Calvary and died for your sin does not mean that you go to heaven automatically. You have to accept Jesus as your personal Savior. See Romans 10: 9-13, the way to salvation.